Kamen Rider Cross-Z is the primary Rider identity of Ryuga Banjo in Kamen Rider Build. As a fierce and loyal fighter, he becomes one of Sento Kiryu’s closest allies and a central member of the series’ main cast. Cross-Z is known for his hot-blooded personality, strong sense of justice, and dragon-themed transformation. Throughout the story, he plays a major role in battling the antagonist forces, protecting others, and growing from a troubled fugitive into a dependable hero.